402593861 has 2 divisors, whose sum is σ = 402593862. Its totient is φ = 402593860.

The previous prime is 402593843. The next prime is 402593879. The reversal of 402593861 is 168395204.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (402593843) and next prime (402593879).

It can be written as a sum of positive squares in only one way, i.e., 402002500 + 591361 = 20050^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 402593861 - 2¹⁰ = 402592837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402593761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201296930 + 201296931.

It is an arithmetic number, because the mean of its divisors is an integer number (201296931).

Almost surely, 2^402593861 is an apocalyptic number.

It is an amenable number.

402593861 is a deficient number, since it is larger than the sum of its proper divisors (1).

402593861 is an equidigital number, since it uses as much as digits as its factorization.

402593861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 402593861 is about 20064.7417376850. The cubic root of 402593861 is about 738.3955137665.

The spelling of 402593861 in words is "four hundred two million, five hundred ninety-three thousand, eight hundred sixty-one".